In this mini tutorial we will be accomplishing the following:

Installing JRuby 1.6.3
Setting JRuby as our default Ruby interpreter
Setting Ruby 1.9 as the default interpreting mode for JRuby.

Open up Terminal.app and let’s get started.

rvm install jruby-1.6.3
rvm use jruby-1.6.3 –default
vi ~/.bash_profile

Once you’re in VI, add the following at the end and save it:

export JRUBY_OPTS=–1.9

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